A panel discussion with Apollo astronauts took place during the Apollo 11 50th Gala, present by Northop Grumman, inside the Apollo/Saturn V Center at the Kennedy Space Center Visitor Complex in Florida on July 16, 2019. From left, are Apollo 9 astronaut Rusty Schweickart, Apollo 11 astronaut Michael Collins, Apollo 16 astronaut Charlie Duke, and Apollo Flight Director Gerry Griffin.